Hi there. First of all the display versions/revisions on blackberrys have the same phisical size of this I am 100%. Different versions are for different hardware revisions. All the blackberrys are this way. Ex the 9000 bold has 4 different revisions 001 to 004.

Secondly on the newer blackberrys you can't change the panel/glass in front of the display. It is glued on the entire surface of the LCD, trust me I tried it.
This is true for the 8900, 9000, 9700, 9780 and possibly more models. Any site or shop saying that they have original glass/panel for these models is lieing.

As for what you ordered, it may have been a so called swap display from a dead phone, as long as its not scratched it shoudn't bother you. Now as for the version of the display, that has to be the same version as the original or else it simply won't work.

Try to negotiate with the shop who sent you the LCD to exhange it for another version.